Motor-truck.



PATENTED OCT. 9, 1906. C. SCHMIDT. MOTUR TRUCK. APPLIUATION FILED DB0. 5, 1905.

2 SHEETS-SHEET 1.

CARLOS SClrllVllDl, 0F SANFRANCISCQ, CALIFRNA.'

Moron-Tauck.

l Nasaenee.

Specification of Letters Patent.

Patented oci. e, ieee.

Application filed December 5, 1905. Serial No 290,421.

T0 @ZZ whom, zit may concern:

Be it known that l, CARLO-s SCHMIDT, a citizen of the Republic of Chile, residing at San Francisco,` .in the county of San Fran- 5 4ciscofandState of California, have inventedcertain new and useful Improvements in MotorfTrucks, of which the following is a specification. 1 o

My invention relates to motor-trucks, and

especially toimprovements upon the inventionl shown in a certain patent lgranted tol me September 5, 1905,-and numbered 7 98,926.

They resent improvements relate more es ecial y to the driving of the front and rear w eels, to the'use of changespeed gearing in the driving system, and -to various details of construction and arrangement, all Vtending to form an improved'truck.

An embodimentof my invention is 'shown in the accompanying drawin ls, in which-` Figure 1 is a longitudineJ section of the truck on the line 1l l of Fig. 2. Fig. 2 is a plan view` partly broken away. Fig. 3 is a front elevation, also artly broken away. Fig. 4 is a detail view of the steering mechanism.

As in the case of my previous invention, this truck is intended'for the transportation of heavy loads and' Ahas Consequently a strongly-supported platform low hung between large front and rear wheels. The truck is automobile and the propelling power is a `motor 1 of any desired character. This motor is located just forward of the platform and is somewhat inclined, as shown in Fig. 1. The driving-shaft of the motor is connected by clutch mechanism -2 with the shafts whichI drive the front-wheel and rear-wheel gearing and iscontrolled through -alinkl 3 by an accessible lever e for starting, stopping, and

case 6 and operates a change-speed gear in a manner hereinafter describe The front shaft 7 drives the gearing in the front, gearcase 8 throuoha sprocket-chain 9, which con,

nge-sinned reversing. The rear shaft 5 enters the gearV truck under different conditions as to loads, grades, character, and condition of roadway,

Src., to useeither speed or power asdesired.-

Both these ,change-speed gears are simultaneously controlled by a single lever 1G, situated in convenient proximity to the drivers seat. Fig. 3,V in connection with Fig. 2, gives a clear illustrationfof this construction and operation. i The shaft 1G, which carries the lower forward sprocketdvheel 17, enters the forward gearecase andV carries a fixed* bevel-pinion 18'. lThis inion engages another bevel-pinion 19, w 'ch is loose on the.

transverse shaft 20. When the pinion 19 is fixed upon shaft 20, the gear is arranged 'for speed. For low speed and power the-shaft 2O is provided with worm gearing. The sprocket wheel shaft 16 has a spur pinion 24, as best lshown in Fig. 2, whichengages another spur-pinion 23 on ashaft'25 in the gear-case, which shaft has aworin 26.` This worm is in constant engagement with a loose worm 27 on the shaft 20. Two clutchesv 23 29,`iXed upon said shaft 20, are connected by a rod 31,.as shown in Fig. 3, and this rod is in turn controlled by the drivcrs level' 10, so that when one speed is thrown on the other is thrown ofi. The arrangeniient in the rear gearecase is substantially the same excepting y that no lintermediate sprocket connection isemployed, since the drivingshaft 5 itself enters the rear gear-casejust as -the shaft 15 'enters the forward gear-case.

The same arrangement of bevel and worm gears and of controlling-clutches is employed inthe rear gear-case asin the front gear-case. The clutches on the rear transmitting-shaft 20 are controlledv from the drivers lever 10 through the longitudinal rod 32.

I have considerablymodied and improved the steering' apparatus as compared with that shown in my previous patent, in which both front wheels were mounted upon a com mon axle swiveling upon a kine-bolt. In the present case the forward whee s are independently swiveled to the truck-frame by.

means of the bolts 33 and lugs 30, as best shown in Fig. 3` nection with Fig. 4, clearly il ustra'tes the steering connections. 34, through bevel-gearing, drives the wormshaft 351 The pivoted seetor'36 has an. intermeshin worm 37 and anY ern/133.- This arm is jointed to the connec-ting-rods 39, j

The latterii ure, in con-4 The hand-wheel shaft 4rear driving-shaf t is entirely beloW the platform, having the latter free and unobstructed, Whereas in `my previous patent the motor lWasr mounted upon-'the platform and the rear-'driving-shaft Was vpartly above said platform and passed through an opening y therein.` vOther advantages of my device,

such as the simultaneous driving bychange- Y speed gearin of both pairs of Wheels and e: improve steeringv arrangement, will be v notedvby those skilled in the art.

I dof not limit myself to exact Adetails of' construction and arrangement herein de-l scribed, and shown in the drawings, as I de- ,l Sire tol avail myselfof such modifications and euivalents as fall `properly within the spirit 0 my invention.

Having thus described my invention, what- I claim as new, and desire to secure by Let-v 1. In a motor-truck, carryingwheels,` a platform, a motor, independent change-speed gearing for driving the front and rear W eels respectively, and means for simultaneously chan g speed in both driving-gearings.

2.. n a motortruck, front and rear carrying-Wheels, a motor, change-speed drivinggearing for each pair of Wheels comprising a evel-gearingand a Worm-gearing; and

means for simultaneously connecting the said gearing at both ends ofthe truck.

3. In a motor-truck, front and rear carrying-Wheels provided with gears, a motor, front and rear gear-cases, transverse shafts passingl through said gear-cases, and carrying pinions engaging With the gears on the carrying-Wheels,a bevel-gear and a worm-gear loose upon each of said-transverse shafts, a driving-shaft entering each gear-case, and having bevel-gear and worm-gear connections with said loose gears, clutches for securing either l'oose gear to the shaft upon Whichit is mounted, and a sin lelever having connections to all kof saidr clutches whereby the change of speed is simultaneously accomplished in both gear-cases.

In testimony whereof I have affixed my signature, in presence of two Witnesses, this 22d day of November, 1905.

CARLOS SCHMIDT.

Witnesses:

M. R. Snam', F. M. BARTEL. 

